What is the material Callout of 991Series

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 Question : What is the material callout of 991 series

 

 

 

 

 

Answer:

 

Stud is made from steel 1.1147 or 1.1132

Wing is made from steel 1.0333 or 1.0330 or SPCC

Cross pin is made from steel 1.1200

Belleville washers are made from steel 1.1231